in law enforcement for years and years. and, mike, let's just you and i walk through what we know right now as we're looking at these pictures, coming into cnn for first time, what more do you know? >> well, brooke, we're hearing also from our affiliate kprc, they have one person detained there on campus. where on campus? we don't know. they don't -- they're not sure if this is the person who was the active shooter there, on the campus of the lone star college, harris north campus, they don't know. but i've been watching this for a number of minutes before i came on with you, brooke. and i've seen at least two, possibly three people that they had been working on, the ems has been working on, there on the scene. we don't know the conditions of anyone injured there. we don't know whether or not this person they have detained again is the active shooter that was there on campus. >> all right, mike. what is happening as we see this tremendous law enforcement presence? how do they, as we know that this college is telling people, if you're on campus, shelter in place. look at the masses of ca